Water-motor.



P. T. COFFIELD.

WATER MOTOR.

APPLICATION FILED MAY 10. 1915.

Patented Nov. 21, 1916.

UNITED STATES PATENT OFFICE.

PETER 'I'. COFFIELD, OF DAYTON, OHIO, ASSIGNOR TO THE COFFIELD MOTOR WASHER COMPANY, OF DAYTON, OHIO, A CORPORATION OF OHIO.

WATER-MOTOR.

- Application filed May 10,1915." Serial No. 26,951.

ful Improvements in Water-Motors; and I do declare the following to be a full, clear, and exact description of the invention, such as will'enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and fig-- ures of reference marked thereon, which form a part of this specification. 1 This invention relates to new and usefu improvements in Water motors of the type especially designed for operating domestic washing machines.

The improvements are specific in their character and relate to a further perfection of the motor shown and described in Letters Patent No. 1,082,47 7 granted to Isador Yassenofi on December 23, 1913,, and assigned to The Cofiield Motor Washer Company of Dayton, Ohio, of which I- am the president.

The objects and purposes of the improvements are to increase the efficiency of the motor in inexperienced hands. This is accomplished by certain specific improvements for compresslng. the spring up to the requisite point only and thus relieving it of any over-compression, and specific means for sealing the attached end of the motor cylinder without employing packing which is usually undesirable in a motor of this character.

In the accompanying drawings, Figure 1 is a longitudinal sectional elevation of the motor containing my improvements on the line 1-1 ofFig. 4; Fig. 2 is a longitudinal elevation taken on the line 22 of Fig. 4; Fig. 3 is a cross-sectional view on the line 3-3 of Fig. 1; and Fig. 4 is a cross-sectional view on the line H of Fig. 1.

In the description to follow-and in the drawings, similar reference characters indi cate corresponding-parts.

1 designates the cylinder or motor casing containing a reciprocab'le piston 2 attached to a hollow rod 3 extending out, of an end of the cylinder through an apertured boss 4 and gland 5 fitting therein. The end of the rod so extended out of the motor cylinder is designed to be attached to any suitable power transmission device such as a rack and pinion which elements are not shown.

Specification of Letters Patent. I

Patenteaive 21,1916.

'Tlie 'end of; the" eylin dero posite that through which the rod-3 projects, is provided with a separateinscrted head-6 which provides inlet and exhaust chambers 7 and 8, respectively, for the motive fluid to enter and pass out of the motor. A cap 10 is attachedv to the .end of the cylinderand engages the outer side of the chambered head 6 and holds the same snugly in position against the annular-shoulder Q'formed in the end of the cylinder. This cap. 10 has a screw-threaded engagement with the extreme end of the cylinder'and provides a chamber 11 which communicates-With the opposite end of the cylinder through achannel 12 which is formed in the wallof the cylinder. The inlet and exhaust chambers or passages? and 8 in the inserted head 6 register with passages provided in oppositely disposed nozzles 13 which project from the end of the cylinder and to which the usual inlet and outlet hose (not shown); are attached by the provision. of the inserted head 6 and the screw-cap 1O screwed into the end of the cylinder against said' inserted head, a veryeflicient joint is obtained to prevent leakage of the motor without the employment of packing which is objectionable in motors of this character which are solely confined to domestic use. A double puppet inlet valve 14 and a double puppet exhaust valve 15 seat upon opposite seats in thehead 6 and control the passage of the waterfrom and to opposite sides of the cylinder. These valves, on one side of the head 6, communicate directly with the interior of the cylinder and on one side of the piston, and with. the cylinder on the other side of the piston through the chamber 11 and channel 12. During the movement of the valves, the motive fluid is alternately admitted to one or the other side of the piston 2 arranged in the cylinder and the said motive fluid is likewise alternately discharged from one or the other side of said piston after it has expended its force in driving the piston to the limit of its travel in one or the other direction. For

example, when the valves are in the posifrom the opposite side of the piston through the exhaust valve and chamber 8. When the piston reaches the end of its stroke, the

"alves 14 and 15 are shifted from the posi,

tion shown in Fig. 2 and Will tlius permit the live fluid to pass directly into the cylin-1 der on the opposite side of the piston and out through the channel 12 and chamber 11 to the chamber-'8 in the head 6. The valves are provided with stems 16 and .17 which are connected by a yoke 18 having an apertured boss 19. 'The' connection between the yoke 18 and thestems of the" valveis-"effected through-means of slots 20 and 21 which he at right-anglesto each other in the ends of the yoke. In connecting the yoke to said valve stems, it will be readily seen that one of the stems serves as a pivot for the movement of the yoke-in connecting it with the other stem. This means of connecting the two valvesis simple and efficient. When the yoke is thus connectedto said-valves, 1t is maintained in such connection by means of rod telescopes in the hollow piston rod 3 and in entering said rod it extends loosely through an aperture in a buffer 25. Be-.

tween the buffer 25 and the piston 2, a conical'spring 26 is-arranged around the rod 23. The end of the rod 23 which lies within the hollowrod 3 is provided with a head 27 and ,against the inner end of said 'rod 3 an apertured bufi'eror head 28 is placed through which the rod 28 also passes and with which the head 27 is adapted to engage when I, the .pistonv is moving in one direction, forexample,',to the right, as seen in Fig. 2. This apertured head 28 supports the small end of the conicalaspring 26 and the said spring is compressed and expands between the plston and thebufier 25 or more correctly speaking between the two buffers 25 and 28'. The buffer 25 being in the position shown will engage the boss 19 0f the yoke as the piston is moved in one direction. The spring 26 will be compressed until the hub of the buffer 25 engages the buffer 28 and thus form a rigid contact and will cause the valves to initially unseat at which instant the spring-expanding will complete I the throw of said valves. In theother direction of the piston, the head27 of the rod 23 will move the apertured head or buffer 28 to compress the spring and engage-the hub of the buffer 25 and will form a rigid abutment which will cause the valves to-unseat and to be completely moved by the expansion of the spring as before. Thus the valves are reversed during the reciprocation of the piston. to admit and discharge the motive through the axes fluid to and fromopposite sides of the piston. The abutment .or head 28 cooperating with the rod head 27 and the buffer 25 is instrumental in initially unseating the valves in one direction of movement of the piston and the abutment or head 28, buffer 25 and boss 19 accomplish the operation of the valves in the other direction. It will be un- I derstood that the spring 26 is compressed until the head 28 engages the buffer 25 in one movement, and that the said spring is compressed until said head 28 through the engagement with head 27 engages the buffer 25 in the other movement of the piston. Thus the spring is only sufliciently compressed at all times to store sufficient energy to impart a complete movement to the valves after the rigid contact has unseated them against the heavier pressures of the water holding them to their seats. Apertured projections 29 extend from the piston and afford means for loosely mounting the bufier 25 which is maintained in position thereon by pins 30. The piston is provided with packing 31 of a suitable character which is turned parallel'with the circumference of the piston and engages the interior of the cylinder. A series of teeth or serrations 32 are provided under the surrounding edges of the packing on the piston to hold the packing against the sides of the cylinder and to thus permit the water to gain access to the leathers to properly saturate and expand 1.' In a water motor, a cylinder having a detachable chambered head at one end, double puppet inlet and exhaust valves mounted 'in said head, a yoke connecting said valves,

a piston movable in said cylinder, a hollow rod extending from said piston on one side, a buffer engaging one side of the piston, a second buffer loosely supported on the piston, a conical spring mounted between said buifers, a rod movable in the hollow rod extending from the piston and projecting of the buffers and the spring and connected at one end to said valve yoke, said rod being adapted to engage one of the bufi'ers to cause a compression .of the spring in the movement of the piston in one direction, the other bufier be-.

ing adapted to engage the valve yoke to compress the spring in the movement of the piston. in the other direction, said butters being adapted to engage each other after the spring is compressed and to thereby form a rigid abutment to unseat the valves in the movement of the piston in both directions.

2. lin a Water motor, a cylinder provided with an enlarged end with an interior annular shoulder therein and inlet and outlet pipes extending theret'ron'i, a head inserted in the enlarged end of said cylinder against said annular shoulder and having inlet and outlet passages communicating with said inlet and outlet pipes, a cap inserted in the enlarged end of said cylinder and maintaining said head in rigid engagement with said annular shoulder, to e'lliect a Watertight joint between said head and the cylinder, said cap providing a chamber on the outside of said head with vvhich the inlet and outlet passages in said head communicate, means providing a communication between said chamber and the remote end of the cylinder, valves in said head controlling the passages between the said head and the chamber on the outside thereof, a piston movable in said cylinder, and means interposed between said piston and said valves for operating said valves.

In testimony whereof I afiix my signature.

PETER T. COFFIELD. 

